Tobacco pipe



MacDOUGALD DEXTER TOBACCO PIPE Filed May 29, 1933 Maflflau qkiid Dexter ATTORNEY; I

Patented Dec. 25, 1934 UNITED, STATES- PATENT. o FIcE :roBAooo PIPE MacDougald Dexter, Columbus, Ga. v I Application'May 29,3933, Serial no. 673,467

' 1 Claim. (cl. 131-12) lyly'invention rclates to a tobacco pipe, and has for its object theaprovisien of a pipe which shall incorporate therein a means for cooling the smoke, condensing the vapors in the smoke, and scrubbing 5 the'condensed vapors out of the smoke, before thesmoke reaches the smokers mouth.

A further object of my invention is to provide an improved stem for a pipe'which shall be 'eflective to radiate the heat of the 'sinok'e to the sur- .10 rounding atmosphere and thus cool-the smoke -A still further object ,of my invention is to prof vide a "scrubbing and filtering element for a pipe l stem in the form of a spiral made of absorbent 20 .material and wound about a core of absorbent material, and so formed that the ends of the spiral or the core cannot enter and obstruct the passage s leading from the bowl of the pipe or the passage in the bit in the end of the stem. As is well known in the art to which my invention relates, the principal objection to pipe smoking centers around the fact that condensed vapors containing nicotine from the tobacco are deposited by condensation in the bowl and stem of the pipe,

and upon a sufficient accumulation thereof are drawn by the smoker into his mouth, producing nausea, excessive-expectoration, and discoloration of the teeth. Various means have been proposed in the past to overcome this objection, most of which have consisted in some sort of a trap in the stummel or adjacent the bowl of the pipe, whereby to trap these condensed vapors where they may be periodically cleaned out. Also, various fo'rmsof filters havebeen proposed which are incorporated in the bottom of the bowl 'or in the stem of the pipe, the purposes of which are to filter the smoke, more or less, andthus reduce the amount of con-- densation products passing. outwardly through the bit.

My invention contemplates a marked improvement on any of the efforts which have heretofore been made and with which I am familiar, in that I provide, within a limited area, the maximum of g radiating and convecting surface for the heat 0 from the smoke, the maximum length of travel for r the smoke from thetime it leaves the bowl of the pipe until it reaches the smoker's month, while all i the time exposing it to the radiating and connecting surface. All'the while the smoke is travelling 55 through the long tortuous condensing e While many suitable materials will suggest themand is preferably provided with a bead 16 adjawhich I provide, "it is subjected to a frictional scrubbing action which serves to remove the condensed vapors. The result is that when the smoke reaches the smokers mouth, all of the condensible vapors, containing tarry products, nicotine, and 5 -water, are removed.

' 'A' pipe made in accordance with my invention is illustrated in the accompanying drawing forming a part of this applicatiomin which Fig. 1 is a longitudinal sectional view of the pipe;and;. Fig. 2 is an enlarged sectional view taken along the line II-II ofFig. 1.

Referring to the drawing for a better under-- standing of my 'invention; I show a pipe comprising a bowl 10, a stem 11, and a bit or mouthpiece 12 fitting into the stem. 7

The bowl 10 may be made of any suitable material commonly used in the manufacture of pipes, but is preferably formed as shown with- I out-a stummel, so that the stem 11 fits directly into the'bowl of the pipe. The reason for this is to decrease the" weight of the pipe and to provide the maximum of radiating and condensing surface. It also avoids trapping a mass of condensation products remote from the filtering element, which will presently be described. The stem 11 is made of a relatively thin material having a high heat conducting co-eificient.

selves, I. have found that a thin tube made of aluminum is admirably suited-for making the stem. The stem 11 being made of thin material, and of a. diameter corresponding to that usually found pipe designs, has a relatively large bore13.

Adjacent the bowl 10 the stem may be formed with a taper 14 whereby to make a tight fit in a suitable bore 24 formed in the bowlof the pipe,

cent the bowl "of the pipe to form 'ashoulder which may bottom against the outside of the bowl. The bit 12 fits snugly within the outer end of the stem and, .for the purpose of improved appearance, should-be provided with a slight shoulder 17 to merge with the outer surface of thestem11.

Disposed'within the stem 11 between the bowl 10 and the bit 12, is my improved filtering and I scrubbing element. The filtering andscrubbin'g 5o element comprises a spiral 18 made of fibrous material woven into a twisted wire,-such as, is used in the manufacture of ordinary pipe cleanersr The spiral 18 is wound about'a central core 19 made of the same-material. The spiral the bore 13 of the stem 11. The central core 19, as shown in the drawing, is shorter than the length of the coil formed by the spiral '18, so

that the ends of the core 19 can not enterand obstruct the passage 21 in the bit 12, or the passage 22 leading from the bowl 10 of the pipe. Also, in order to prevent any possibility of stoppage of the passages 21 and 22, I turn the ends 23 of the coil 18 in a direction parallel with the central core, whereby they are caused to abut against the ends of the bit 12 and the bottom of the enlarged bore 24 of the bowl and are thereby prevented from entering said passages.

From the foregoing description, the operation of my improved pipe will be readily understood. Smoke, laden with condensible vapors passes from the bowl 10 of the pipe into the stem 11, and due to the snug fit of the coil 18 and to the central core 19, is forced to follow the convolutions of the'coil 18 in its travel to the smokers mouth. The core 19 prevents any short circuiting of the smoke through the center of the coil, and the snug fit of the coil 18 prevents any short circuiting oi the smoke over the outer periphery of the convolutions of the coil. In its travel through the stem, the heat from the smoke is radiated through the thin conductive walls of the stem, facilitating the condensation of thevapors in the smoke. Upon being condensed, the condensation products are scrubbed out of the smoke-by intimate frictional contact with the 18, as shown in the drawing, fits snugly within fibrous material forming the convolutions and the central core of the filter element. Whenever the scrubbing and filtering medium has become saturated with condensation products, it is discarded and another put in its place, so'that the pipe may, at all times, be kept clean and fresh. The filtering element is inexpensive, costing no more than ordinary pipe cleaners already used by smokers.

While I have shown my invention in but one form, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various changes and modifications, without departing from the spirit thereof, and I desire, therefore, that only such limitations shall be placed thereupon as are imposed by the prior art or as are specifically set forth in the appended claim.'

What I claim is: I

A filter for a pipe stem consisting of a straight axial member and a helical member surrounding said axial member, the ends of the helical member being bent so as to extend in planes adjoining 'to but not in alignment with and extending past the ends of the axial members, whereby when the filter -is inserted in the bore of a pipe stem an unobstructed passage will be formed between the bowl opening and the mouthpiece opening,

formation.

MAODOUGALD DEXTER. 

